Intel Celeron 2.0 GHz
Single core 32-bit

2GB RAM (2 x Crucial 1GB DDR)

Motherboard i845GV-SMC192
Video Intel Integrated 82845G

Rear:
4 x USB 2.0
3 x RJ-45 Serial
1 x Parallel
1 x VGA
1 x Ethernet 10/100
1 x 12-volt USB
1 x 24-volt USB
1 x Distributed customer display port
1 x PS/2
2 x Cash drawer connectors

Side:
2 x USB 2.0
1 x PS/2
1 x PC Card Type 2
1 x External Floppy
1 x Mic In
1 x Headphones Out

2 x USB 1.1
1 x Ethernet

https://public.dhe.ibm.com/software/retail/poseng/surepos500/
https://theretroweb.com/chipsets/319

https://www.linuxquestions.org/questions/linux-hardware-18/ibm-surepos-4840-w-suse-10-2-touchscreen-won%27t-work-511411/
https://elosupport.elotouch.com/hc/en-us/p/Driver-Linux-Intel

https://www.freedesktop.org/wiki/Software/xinput_calibrator/

Swap out the internals with something bearable. Design adapters for display and tailgate I/O board. Side I/O could also work with an adapter.

See https://github.com/w4b-zero/IBM_4820-48T/tree/main for a project related to another monitor model. See if documents, notes are applicable here.